Alert archive / California / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 30, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 6, 2015, 9:27 PM PDT for Riverside County, San Bernardino County, California. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 6, 2015, 9:27 PM PDT (04:27 UTC)
- Expired
- Aug 6, 2015, 10:00 PM PDT
- In force
- 33 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
The radar
The Santa Ana Mts radar (KSOX), 152 km from the middle of the area, began a volume at 04:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 4.5 hours before the alert went out and 195 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2253 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 6, 7:03 PM PDT, 2 hours 24 minutes earlier.
Area forecast discussion, Aug 6, 7:03 PM PDT, 2 hours 24 minutes before
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Special weather statement, Aug 6, 3:43 PM PDT, 5 hours 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 343 PM PDT THU AUG 6 2015 CAZ031>033-062315- IMPERIAL COUNTY CA-RIVERSIDE COUNTY/EASTERN DESERTS CA- LOWER COLORADO RIVER VALLEY CA CA- 343 PM PDT THU AUG 6 2015 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL COUNTIES UNTIL 415 PM PDT AT 343 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15 MILES WEST OF PALO VERDE...OR 29 MILES SOUTHEAST OF DESERT CENTER... MOVING NORTH AT 10 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... LOCALLY DENSE BLOWING DUST IS POSSIBLE. IF YOU ENCOUNTER BLOWING DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE. && LAT...LON 3339 11486 3338 11510 3359 11514 3359 11480 TIME...MOT...LOC 2243Z 181DEG 10KT 3347 11499 18
Special weather statement, Aug 6, 5:04 PM PDT, 4 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 504 PM MST THU AUG 6 2015 AZZ026-070030- SOUTHWEST DESERTS AZ- 504 PM MST THU AUG 6 2015 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... CENTRAL YUMA COUNTY UNTIL 530 PM MST AT 504 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER TACNA...OR 25 MILES EAST OF FORTUNA FOOTHILLS...MOVING NORTH AT 10 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... TACNA AND ROLL. PRECAUTIONARY/PREPAREDNESS ACTIONS... LOCALLY DENSE BLOWING DUST IS POSSIBLE. IF YOU ENCOUNTER BLOWING DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE. && LAT...LON 3265 11389 3263 11403 3279 11412 3283 11388 TIME...MOT...LOC 0004Z 170DEG 9KT 3269 11397 18
Local storm report, Aug 6, 5:34 PM PDT, 3 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
534 PM MST THU AUG 06 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM DUST STORM 2 WSW TACNA 32.68N 113.98W
08/06/2015 YUMA AZ TRAINED SPOTTER
VSBY LESS THAN 0.25 MI. AND ESTIMATED WIND GUSTS TO 40
MPH
&&
EVENT NUMBER PSR1500095
PSRSpecial weather statement, Aug 6, 7:14 PM PDT, 2 hours 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
714 PM PDT THU AUG 6 2015
CAZ033-070230-
IMPERIAL COUNTY CA-
714 PM PDT THU AUG 6 2015
...SIGNIFICANT WEATHER ADVISORY...
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
NORTHWESTERN IMPERIAL COUNTY
UNTIL 730 PM PDT
AT 714 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SALTON CITY...MOVING NORTH AT 40 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
SALTON CITY...DESERT SHORES...SALTON SEA BEACH...WINONA AND COOLIDGE
SPRINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
LOCALLY DENSE BLOWING DUST IS POSSIBLE. IF YOU ENCOUNTER BLOWING
DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND
PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE.
&&
LAT...LON 3308 11609 3312 11608 3342 11608 3342 11579
3299 11595 3306 11611
TIME...MOT...LOC 0214Z 187DEG 36KT 3327 11605
18Special weather statement, Aug 6, 7:46 PM PDT, 1 hour 41 minutes before
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</html>The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 5:04 PM PDT | Special Weather Statement | PSR | Yuma | 26 min |
| Aug 6, 7:14 PM PDT | Special Weather Statement | PSR | 16 min | |
| Aug 6, 9:41 PM PDT | Special Weather Statement | PSR | 34 min | |
| Aug 7, 6:06 AM PDT | Special Weather Statement | PSR | 39 min | |
| Aug 7, 6:52 AM PDT | Special Weather Statement | PSR | Pinal | 38 min |
| Aug 7, 7:29 AM PDT | Special Weather Statement | PSR | 46 min | |
| Aug 7, 11:41 AM PDT | Special Weather Statement | PSR | Gila | 49 min |
| Aug 7, 11:44 AM PDT | Special Weather Statement | PSR | Gila | 46 min |
| Aug 7, 11:51 AM PDT | Special Weather Statement | PSR | Gila | 54 min |
| Aug 7, 11:56 AM PDT | Severe Thunderstorm Warning | PSR | Gila | 49 min |
| Aug 7, 12:21 PM PDT | Areal Flood Advisory | PSR | Gila | 3 hr |
| Aug 7, 12:29 PM PDT | Special Weather Statement | PSR | Gila | 61 min |
| Aug 7, 12:53 PM PDT | Special Weather Statement | PSR | Gila | 82 min |
| Aug 7, 1:25 PM PDT | Flash Flood Warning | PSR | Gila | 3 hr |
| Aug 7, 1:54 PM PDT | Blowing Dust Advisory | PSR | 2 hr | |
| Aug 7, 2:16 PM PDT | Flash Flood Warning | PSR | Gila | 3 hr |
| Aug 7, 2:22 PM PDT | Special Weather Statement | PSR | Gila | 53 min |
| Aug 7, 2:28 PM PDT | Severe Thunderstorm Warning | PSR | Pinal | 17 min |
| Aug 7, 3:19 PM PDT | Special Weather Statement | PSR | Pinal | 41 min |
| Aug 7, 4:20 PM PDT | Special Weather Statement | PSR | 25 min | |
| Aug 7, 4:47 PM PDT | Special Weather Statement | PSR | Maricopa | 43 min |
| Aug 6, 7:26 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 19 min |
| Aug 6, 7:46 PM PDT | Special Weather Statement | PSR | Riverside | 29 min |
| Aug 6, 9:11 PM PDT | Special Weather Statement | PSR | Riverside | 34 min |
| Aug 6, 10:54 PM PDT | Special Weather Statement | PSR | Riverside | 36 min |
| Aug 7, 12:46 AM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 3 hr |
Nearby
Severe Thunderstorm Warnings in California, 2015Every severe thunderstorm warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.